“By early 2014, WhatsApp users were sharing more pictures than were posted on Facebook and the service had twice as many users as Twitter. WhatsApp was adding a million users a day when Facebook decided it had to buy them for $19 billion. WhatsApp is a classic network model subscription, in which the value of being a subscriber increases as more people subscribe.”
“WhichTestWon.com subscribers pay $25 per quarter or $75 per year for a subscription. When I interviewed Holland, I asked her why the cost of the subscription was so low. “That’s intentional,” Holland said. “We keep the price low to get as many paying customers as we can. It’s a gazillion times easier to convert a paying customer into an event attendee than it is to convince a nonpaying customer to come to an event.”
“Holland employed a full-time telemarketer who called people who had ordered a $7 case study. First, the telemarketer would ensure that the customer had received the case study and then would follow up with an invitation to a live event on the same topic. “We ended up selling 900 tickets to a $1,500 conference just because we called someone who bought a $7 article.”